BoJack Horseman—undoubtedly the most heartwrenching, devastating show to also feature a talking whale named Tom Jumbo-Grumbo—is gearing up for its final eight episodes, which hit Netflix on January 31. The streamer released the first trailer today for season 6's second half, which promises the series' trademark blend of screwball animated comedy and sobering reality. The series, created by Raphael Bob-Waksberg, follows former sitcom star and all-around hot mess BoJack Horseman (Will Arnett) as he tries to get his life together in the colorful, animated city of Hollywoo. Well, that's the basic gist, but …